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        Red Pepper (Capsicum annuum L.) Seed Extract Decreased Hepatic Gluconeogenesis and Increased Muscle Glucose Uptake In Vitro

        김하은,조계원,정정호,박기범,류융선,Knowledge Mudhibadhi Moyo,김현경,고광웅 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.7

        Red pepper seed, a by-product of red pepper, has been reported to have antioxidant and antiobesity activities. However, its role in diabetes has not yet been highly investigated. Glucose homeostasis is mainly maintained by insulin, which suppresses glucose production in the liver and enhances glucose uptake in peripheral tissues. In this study, we investigated the underlying mechanisms through which red pepper seed extract (RPSE) affects glucose production in AML12 hepatocytes and glucose uptake in C2C12 myotubes. RPSE reduced glucose production in a dose-dependent manner in AML12 cells. The levels of glucose 6 phosphatase, phosphoenolpyruvate carboxykinase, and critical enzymes for hepatic gluconeogenesis were decreased by RPSE. Gluconeogenesis regulating proteins, Akt and forkhead box protein O1, were also activated by RPSE. In addition, RPSE increased glucose uptake in C2C12 via inducing translocation of glucose transporter type 4 from cytosol to plasma membrane. Analysis of the insulin-dependent pathway showed that the activities of insulin receptor substrate 1, phosphatidylinositol 3-kinase, and Akt were significantly stimulated by RPSE. In conclusion, RPSE might improve glucose homeostasis by reducing hepatic gluconeogenesis and increasing peripheral glucose uptake. Results obtained also suggest that RPSE can be a compelling antidiabetic nutraceutical.

      • SCOPUSKCI등재

        Corn silk extracts did not alter the adiposity and underlying substrate utilization in high-fat diet-induced obese C57BL/6 mice

        Kang, Eun Young,Kim, Hyun Kyung,Moyo, Knowledge Mudhibadhi,Gang, Gyoungok,Kim, Wooki,Go, Gwang-woong Korean Society of Food Science and Technology 2020 한국식품과학회지 Vol.52 No.2

        Corn silk (Okmi-su) was anciently adopted as a material for tea or beverage. Corn silk extracts (CSE) contain bioactive phytochemicals such as phenolic acid, flavonoids, ascorbic acid, tannins, and glycosides. Under the impact of these functional components, CSE has benefits for antioxidation, diuresis, anti-diabetes, and dyslipidemia recovery. Nonetheless, its role in whole-body adiposity was not investigated; therefore, the effects of CSE on obesity were evaluated in high-fat diet-induced obese mice. Mice were assigned to either group (n=12); 1) normal diet (18% kcal from fat), 2) high-fat diet (45% kcal from fat, the control), 3) high-fat diet with CSE (800 mg/kg diet), and 4) high-fat diet with orlistat (500 mg/kg diet, a comparable control for weight loss). Our results showed that body weight, adiposity, and energy expenditure in obese mice were not altered by CSE. Lean body mass tended to decrease by CSE, which can be explained by stimulation of diuresis (p=0.06). In conclusion, our results suggest that dietary consumption of CSE does not influence the adiposity and underlying substrate utilization in high-fat diet-induced obese mice.

      • SCOPUSKCI등재

        Corn silk extracts did not alter the adiposity and underlying substrate utilization in high-fat diet-induced obese C57BL/6 mice

        Eun Young Kang,Hyun Kyung Kim,Knowledge Mudhibadhi Moyo,Gyoungok Gang,Wooki Kim,Gwang-woong Go 한국식품과학회 2020 한국식품과학회지 Vol.52 No.2

        Corn silk (Okmi-su) was anciently adopted as a material for tea or beverage. Corn silk extracts (CSE) contain bioactive phytochemicals such as phenolic acid, flavonoids, ascorbic acid, tannins, and glycosides. Under the impact of these functional components, CSE has benefits for antioxidation, diuresis, anti-diabetes, and dyslipidemia recovery. Nonetheless, its role in whole-body adiposity was not investigated; therefore, the effects of CSE on obesity were evaluated in high-fat diet-induced obese mice. Mice were assigned to either group (n=12); 1) normal diet (18% kcal from fat), 2) high-fat diet (45% kcal from fat, the control), 3) high-fat diet with CSE (800 mg/kg diet), and 4) high-fat diet with orlistat (500 mg/kg diet, a comparable control for weight loss). Our results showed that body weight, adiposity, and energy expenditure in obese mice were not altered by CSE. Lean body mass tended to decrease by CSE, which can be explained by stimulation of diuresis (p=0.06). In conclusion, our results suggest that dietary consumption of CSE does not influence the adiposity and underlying substrate utilization in high-fat diet-induced obese mice.

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